The highlighted number are composite numbers which means numbers that can a whole number that can be divided evenly by numbers other than 1 or itself. Example: 9 can be divided evenly by 3 (as well as 1 and 9), so 9 is a composite number. 6 can be divided evenly by 1, 2, 3 and 6 so it is NOT a prime number (it is a composite number). While the unhighlighted numbers are prime numbers A prime number is a whole number greater than 1, whose only two whole-number factors are 1 and itself. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29.

1)The highlighted numbers are composite number which means that the number has more thantwo different factors which mean that they can be divided evenly.The unhighlighted numbers are prime numbers .these numbers only have exactly two different factors.that is the number itself and 1.2)Examples of composite numbers:16 25 55 Examples of prime numbers:3 7 97 89